I will agree that Tamaki disappointed me, and some of the effect were over the top and dumb (I hate when Tamaki's heart is beating out of his chest. SO STUPID).
But overall I'm enjoying it. I absolutely LOVE Kyouya is this series. I think I may love him more than my beloved Tamaki :-O He absolutely cracks me up (the episode where Haruhi and Hikaru go on a date has some great scenes of Kyouya being hilarious!!!)
Still love the manga most of all, though.

The first couple of episodes i was kinda like, "oh this is kinda....boring" but i somehow couldnt stop myself from watching. Now, i absolutely LOVE it. They recently made a movie. it came out about a week ago in Japan.
As for cosplay, I prefer the anime. When people see it it hits them right away as Ouran, where as it would take them a minute with the live action.